How to add an variable to the object name of the arraylist

Question

Greetings,
i will like to create an object for arraylist with it name concat with a variable. This is what i mean as show below.
for i=1; i <8; i++)
ArrayList list = new ArrayList();
What i want when it loops, the arrayliost will auto create list1, list 2, list3 and so on until the for loops end. How do i add the variable i to the object name list?
Thanks

Answer 1

Do anyone of u mind if let me know hows the code look like?This isn't intended to be an alternative to the previous reply: in fact it's worthless unless you read the information in the link given.
import java.util.ArrayList;
import java.util.InputMismatchException;
import java.util.List;
import java.util.Random;
import java.util.Scanner;
public class ListListEg {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        Random random = new Random();
            // create the mainList outside the for loop
        List<List<Integer>> mainList = new ArrayList<List<Integer>>();
        System.out.print("How many lists would you like? ");
        try {
            int num = in.nextInt();
            if(num <= 0) {
                System.out.println("Smartass!");
                System.exit(1);
                // populate the main list inside the loop
            for(int i = 0; i < num; i++) {
                mainList.add(new ArrayList<Integer>());
        } catch(InputMismatchException ime) {
            System.out.println("Idiot!");
            System.exit(1);
            // later do stuff with the lists, which you access with get()
        for(int i = 0; i < mainList.size(); i++) {
            for(int times = 0; times < 3; times++) {
                mainList.get(i).add(random.nextInt());
        System.out.println("The first list is " + mainList.get(0));
        if(mainList.size() > 1) {
            System.out.println("The second list is " + mainList.get(1));
        System.out.println("The last list is " + mainList.get(mainList.size() - 1));
}(In reality all the action would not take place in one method like this, and the exception handling would be more useful and polite.)